“Rob was looking at her phone on the morning of his birthday as he wanted to take a picture of something when she was in the shower," a source told The Sun. "Suddenly this message flashes up and it’s not what he wanted to see. He got straight up and left. Despite Kristen’s pleas, he told her not to come to his birthday party at a friend’s that night. He’s extremely angry and upset. No matter how many times she calls or texts, friends say he’s had enough. After everything that happened and the hurt she caused, he’s furious she’d be back in touch with him, even if she is saying it’s completely innocent."